Legacy license compliance widget removal

What does this MR do and why?

As a follow up to #367703 (closed)

This removes the feature flag code.

Screenshots or screen recordings

Screenshots are required for UI changes, and strongly recommended for all other merge requests.

How to set up and validate locally

• Reach out to me for a demo, or attempt steps below
• Clone the https://gitlab.com/gitlab-examples/security/security-reports project locally
• Manually trigger the pipeline to run for Master. This can be done by going to the CI/CD -> Pipelines tab on the left nav and then clicking the Run Pipeline button.
• Set up Allowed/Denied licenses in https://<localhost>/<group>/<project>/-/licenses#policies
• Create a new MR. I suggest changing something simple like a letter or two in the README.md file. We just need a pipeline to complete and run. The sample project uses test reports to generate the data so doesn't matter what you change just need a MR.
• Go to the MR and look for the license compliance widget.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #367704 (closed)

ee/spec/frontend/vue_merge_request_widget/ee_mr_widget_options_spec.js

@@ -3,6 +3,11 @@ import MockAdapter from 'axios-mock-adapter';
 import Vue, { nextTick } from 'vue';
 import VueApollo from 'vue-apollo';
 
+import {
+  registerExtension,
+  registeredExtensions,
+} from '~/vue_merge_request_widget/components/extensions';
+
 // Force Jest to transpile and cache
 // eslint-disable-next-line no-unused-vars
 import _GroupedBrowserPerformanceReportsApp from 'ee/reports/browser_performance_report/grouped_browser_performance_reports_app.vue';
@@ -15,6 +20,10 @@ import MrWidgetOptions from 'ee/vue_merge_request_widget/mr_widget_options.vue';
 // Force Jest to transpile and cache
 // eslint-disable-next-line no-unused-vars
 import _GroupedSecurityReportsApp from 'ee/vue_shared/security_reports/grouped_security_reports_app.vue';
+
+// EE Widget Extensions
+import licenseComplianceExtension from 'ee/vue_merge_request_widget/extensions/license_compliance';
+
 import {
   sastDiffSuccessMock,
   dastDiffSuccessMock,
@@ -935,38 +944,6 @@ describe('ee merge request widget options', () => {
     });
   });
 
-  describe('license scanning report', () => {
-    const licenseManagementApiUrl = `${TEST_HOST}/manage_license_api`;
-
-    it('should be rendered if license scanning data is set', () => {
-      gl.mrWidgetData = {
-        ...mockData,
-        enabled_reports: {
-          license_scanning: true,
-        },
-        license_scanning: {
-          managed_licenses_path: licenseManagementApiUrl,
-          can_manage_licenses: false,
-        },
-      };
-
-      createComponent({ propsData: { mrData: gl.mrWidgetData } });
-
-      expect(wrapper.find('.license-report-widget').exists()).toBe(true);
-    });
-
-    it('should not be rendered if license scanning data is not set', () => {
-      gl.mrWidgetData = {
-        ...mockData,
-        license_scanning: {},
-      };
-
-      createComponent({ propsData: { mrData: gl.mrWidgetData } });
-
-      expect(wrapper.find('.license-report-widget').exists()).toBe(false);
-    });
-  });
-
   describe('CE security report', () => {
     describe.each`
       context                               | canReadVulnerabilities | hasPipeline | shouldRender
@@ -1187,10 +1164,54 @@ describe('ee merge request widget options', () => {
           },
         },
       });
+
       wrapper.vm.mr.state = mergeState;
       await nextTick();
 
       expect(findStatusChecksReport().exists()).toBe(shouldRender);
     });
   });
+
+  describe('license scanning report', () => {
+    afterEach(() => {
+      registeredExtensions.extensions = [];
+    });
+
+    it('should be rendered if license widget is registered', async () => {
+      const licenseComparisonPath =
+        '/group-name/project-name/-/merge_requests/78/license_scanning_reports';
+      const licenseComparisonPathCollapsed =
+        '/group-name/project-name/-/merge_requests/78/license_scanning_reports_collapsed';
+      const fullReportPath = '/group-name/project-name/-/merge_requests/78/full_report';
+      const settingsPath = '/group-name/project-name/-/licenses#licenses';
+      const apiApprovalsPath = '/group-name/project-name/-/licenses#policies';
+
+      gl.mrWidgetData = {
+        ...mockData,
+        license_scanning_comparison_path: licenseComparisonPath,
+        license_scanning_comparison_collapsed_path: licenseComparisonPathCollapsed,
+        api_approvals_path: apiApprovalsPath,
+        license_scanning: {
+          settings_path: settingsPath,
+          full_report_path: fullReportPath,
+        },
+      };
+
+      registerExtension(licenseComplianceExtension);
+
+      await createComponent({ propsData: { mrData: gl.mrWidgetData } });
+
+      expect(wrapper.findComponent({ name: 'WidgetLicenseCompliance' }).exists()).toBe(true);
+    });
+
+    it('should not be rendered if license widget is not registered', () => {
+      gl.mrWidgetData = {
+        ...mockData,
+      };
+
+      createComponent({ propsData: { mrData: gl.mrWidgetData } });
+
+      expect(wrapper.findComponent({ name: 'WidgetLicenseCompliance' }).exists()).toBe(false);
+    });
+  });
 });